﻿// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
// 
// Copyright (c) 2012, Dr. Masroor Ehsan
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//    * Redistributions of source code must retain the above copyright
//      notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above copyright
//      notice, this list of conditions and the following disclaimer in the
//      documentation and/or other materials provided with the distribution.
//    * Neither the name of the <organization> nor the
//      names of its contributors may be used to endorse or promote products
//      derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// $Id: TestPrefixGroupMap.cs 12 2012-01-27 06:11:46Z masroore@gmail.com $
// 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace LWObjects
{
    public sealed class TestPrefixGroupMap : Dictionary<string, string>
    {
        private static readonly TestPrefixGroupMap _instance = new TestPrefixGroupMap();

        private TestPrefixGroupMap()
        {
        }

        public static TestPrefixGroupMap Instance
        {
            get { return _instance; }
        }

        public string GetGroupFromPrefix(string prefix)
        {
            return this[prefix];
        }

        public string GetPrefixFromGroup(string lab)
        {
            foreach (var kvp in this.Where(kvp => kvp.Value == lab))
            {
                return kvp.Key;
            }
            return string.Empty;
        }

        public void LoadFromFile(string fname)
        {
            Clear();
            using (var sr = new StreamReader(fname, Encoding.Default))
            {
                string line;
                while ((line = sr.ReadLine()) != null)
                {
                    var parts = line.Split(new[] {'='});
                    Add(parts[0], parts[1]);
                }
            }
        }

        public void SaveToFile(string fname)
        {
            var sb = new StringBuilder();
            foreach (var kvp in this)
            {
                sb.AppendLine(string.Format("{0}={1}", kvp.Key, kvp.Value));
            }

            using (var sw = new StreamWriter(fname, false, Encoding.Default))
            {
                sw.Write(sb.ToString());
            }
        }
    }
}